Economizer unit



Oct. 9, 1951 1 c. w. GRAY ECONOMIZER UNIT 2 Shee ts-Sheet 1 Filed Jan.16, 1950 Oct. 9, 1951 GRAY 2,570,661

' I ECONOMIZER UNIT Filed Jan. 16, 1950 2 Sheets-Sheet 2 Fig.3.

[/0 Inventor 5 Cloud W. Gray 54 104 y 66 WW 19m Patented Oct. 9, 19 51ECONOMIZEB UNIT Claud W. Gray, El Paso, Tex.

Application January 16, 1950, Serial No. 138,850

Claims.

This invention relates to novel and useful improvements in internalcombustion engines and attachments therefor.

An object of this invention is to improve the operation of an enginewith relation to the efficiency of operation of that engine bycontrollably introducing a low gradefuel into the intake manifold of theengine in response to the temperature ofthe engine.

This is accomplished by employing a thermostat, in an' attachment. Thethermostat is disposedin the line of travel of a current of bypassedengine coolant so that when the engine coolant is suificientl warm orhot, the thermostat is operated thereby opening one valve and closingthe other, these valves being operated directly by the thermostat.Moreover, the valves are arranged to control the inlet or high grade andlow grade fuel into the carburetor or intake manifold of the engine.

Ancillary objects and features will become apparent in following thedescription of the illustrated forms of the invention.

In the drawings: I

Figure 1 is a side view of atypical engine having the device applied inone suggested manner of attachment; 1

Figure 2 is a top view of the attachment with a portion broken away insection to illustrate detail of construction;

Figure 3 is a sectional view taken substantially on the line 3-3 ofFigure 2 and in the direction of the arrows; and

Figure 4 is an enlarged detail view taken in section and showingamodification of the valve arrangement for the'high and low grade fuel.

An engine generally indicated at I!) is provided with the usualappurtenances contiguous to an engine such as a water pump l2 and thecarburetor l4. A fuel pump l6 having a line l8 attached thereto issecured to the engine. This line connects with an unshown tank which isadapted to hold a low grade fuel. A conduit extends from the other sideof the fuel pump I6 and terminates in communication with a passage 22formed in the unit disclosed in Figure 3.

A second fuel pump 24 is secured for operation to the engine and has aline 26 extending from an unshown tank which is adapted to accommodatehigh grade fuel. The line 28 extendin from the opposite side of the fuelpump 24 terminates in communication with a passage 30 formed in the unitdisclosed in Figure 3.

A heated water inlet conduit 32 is secured in communication with thewater jacket of the en- 2 gine, as by a nipple connection with the head,and terminates in communication with the passage 34 (Figure 3). A waterline 36 is connected with the passage 38. The line 36 is attached to thewater pump [2 so as to form a by-pass circuit for the coolant of theengine. A valve 40 is supplied in the passage 38 and has a controlhandle 42 secured thereto. A push-pull link 44 is secured.

to the valve handle 42 in order to operate the by the high grade fuel isintroduced into the bowl- I of the carburetor rather than the low gradefuel.

on which the engine was operating. Accordingly,.

after the engine is stopped, the carburetor bowl is supplied with highgrade fuel for facility of? will be it from the lower part of the-case50. The diaphragm divides the interior of the case into a fuel chamber56 and a water chamber 58.

A flange 60 extends interiorly of the case 50 and forms a seat for thehanger 62. The hanger accommodates the thermostat 46. This thermostathas an operating shank 66 protruding from the upper part thereof andsecured to the diaphragm 54. A valve block 68 is also secured to theoperating shank'56 so that when the diaphragm expands or contracts, thismovement is transmitted directly to the valve block 68.

The hanger 62 is secured by means of a" screw 69 to the lower part ofthe case 56. A drain cook 10 is disposed at the lower part of the'liquidchamber 58 and is carried by the casing 50.

The passage 32 has a spring 14 therein which constantly presses theball-type valve 16in the V-shaped notch 18 formed in one face of the Avalve block 68. The passage 30 has aspring disposed therein whichconstantly presses the ball-type valve 82 against an inclined face 84which forms part of a notch 86 in the valve block in place by means of afluid-tight seal The 55" function of the valve stem 88 is to limit thetravel "I102 respectively.

of the block 68 and also to override the function of the thermostat 46in case of emergency or whenever desired, by simply turning the handle92 and threading the stem 88 downwardly to press against the block 68.

Reference to Figures 1 and 2 shows a conduit 94 communicating with thepassage 95, said passage 95 being in direct communication with the valvechamber formed around the block 68.

The operation. of this form .oftheinventionis as follows: I-Iighgradefuel is pumped by means of the fuel pump 24 into the chamber 56. Thisfuel passes through the passage 95, the conduit 94 and then to the bowlof the carburetor-:sothat the engine may be operated. However, when theengine reaches a predetermined temperature, this high grade fuel is notemployed and fuel. entering the passage 22 and the fuel chamber 56passes through the passageway 95 and intosithe carburetor.

In order'to make the-.change-over, :the liquid coolant of the engine ispermitted to pass through the bypass system including thecham- .ber 58,the conduit 32 and the conduit :36.

The valve 40 is in the open condition at this time.

Inasmuch as the water is passing through this chamber and the thermostat45; is therein, when the water temperature increases, the. thermostat:will expand whereby the valve block 68 will move upwardly.Thiswillcause the ball 15 to :close the passage -3G- which normallyconducts a high .gradefuel. ;At this time the-ball-82 is pressed trated'together with a portion of the :thermostat operating rod-66. 1 The valveblockal fi l'iis reciprocately disposedi'asin thewalvejblock' 6B. Thehall-106 'issimilar in function and construction to, the ball 82, whileitheball I08 is fSi'miIaITiH function: and construction 'to ithe: ball'lfi. The only difference in thextwo embodiments is inthe shape of'thenotches HlLand Ill and: the disposition'of the springs H4 and H6.The springs H4 and H6 are carried in the'notches lilfl and Q I I2 andthe balls are allowed to slideupwardly and downwardly onthe inner wallsof' the valve chamber. Accordingly, the ballsseal the passageways l!)and I02 by being forceditowardthe passages rather than from-"the"passages-as disclosed in Figure3; Thesprings H4 and "H6 react on thevalve block I04 rather-thanrreact on the casing as in the previously{described modification.

Having described the invention, nwhat :claimed'as new is:

1. In an internal'combustion engine which has a liquid coolingsystemrand pa"charge rforming device, an attachment for introducingselectively The diaphragm r54-;is ill-usdifferent grades of fuel intothecharge-forming device; said: attachment comprisingfia case, havingafthermostat therein; avaIveoperatiVelycon- .nected with"said-::thermostat,. :means forming-5a quantity .of, fuel of anothergrade, .said valve 10 being arranged-so that when one of thepassagewaysis open, the other passageway is closed, and

.a manually operable stem connected with said valve in order to retainsaid valve in a selected ,ifixed position.

2. .In an internal combustion engine which has a liquid cooling systemand a charge forming :device, an attachment for introducing selectiveinga by-pass for the cooling-system;a casing "disposed in said means andhaving 'a thermostat therein in communication:with-said means-ea sourceof one grade of fuel and asource-of -another grade of fuel, means-for-conducting"-the fuel of each grade into said casing,-a d-iaphra-g=mseparating said casing into a liquid chamber an'd a fuel chamber withthethermostat inone chamber and the fuel conducting -meanslcommunb catin-gwith the other chamber, and acval-ve arranged to control the flow of'fuel throughsaid fuel chamber operated by said-thermostat.

4. The combination of claim- 2 and said-firstmentioned valve beingarranged *to controh'the different grades of fuel flowing through said'case and including a valve stemwith laterally-opening notches therein,valve memberslocatedr in said notches, means forming valve sea-tsin-said case for receiving said valve members, and means 'yieldinglyopposing the movement-ofsaid-valve members from said notches into-said-sea'ts.

5. The combination of claim 2 and said case having two fuel inletpassageways and an outlet, a valve chamber communicating 'with said'passagewaysand said outlet, said "first-mentioned valve being located insaid fuel chamber "and arranged to control the passage of'fuels'throughsaid passageways andincluding a valve core-with laterally openingnotchestherein, and'-springloaded--valve members located in" saidnotchesand arranged to seat in said passageways.

CLAUD GRAY.

REFERENCES CITED The following references are. ofv lrecordintthe fileofthis patent:

. UNITED fSTATES :PAITENI'S Number Name :Bate

1,214,501 Beck etial. geFebti 11917 1,346,477 --Anderson et.al.,July-l-3;1,9 20 1,543,638 Burger June-.23, 1925

